Provided by: hoichess_0.10.3-4_i386 bug

NAME

       hoichess - xboard compatible chess engine

       hoixiangqi - xiangqi engine

SYNOPSIS

       hoichess [options]

       hoixiangqi [options]

DESCRIPTION

       hoichess is a chess playing program. It implements major parts of the
       xboard/winboard chess engine protocol.

       hoichess uses many of the standard techniques found in modern chess
       programs, like rotated bitboards, principal variation search,
       quiescence search, transposition table and iterative deepening.

       See xboard(6) for instructions about how to use hoichess through
       xboard. To start up quickly, you just need the command: xboard -fcp
       hoichess.

       hoixiangqi is a xiangqi ("Chinese chess") playing program. Currently,
       it also uses the xboard/winboard protocol. However, there is no user
       interface that supports this protocol. In the future, a different
       protocol might be used.

       hoichess and hoixiangqi are built from the same code base, so nearly
       all commands and options, as well as the text based user interface, are
       the same for both programs.

       If run hoichess or hoixiangqi at the command line, the help command
       gives you a brief summary of available commands. See section "COMMANDS"
       for more details about those commands.

OPTIONS

       -h, --help
               Display usage information.

       -V, --version
               Display version information.

       -v, --verbose[=n]
               Increase verbosity. Multiple -v options may be given.
               --verbose=n sets verbosity level n.

       -d, --debug[=n]
               Increase debug level. Multiple -d options may be given.
               --debug=n sets debug level n.

       -L filename, --logfile filename
               Specify file name for logging. The log will be appended to this
               file.  Note: Logging is not yet implemented in the current
               version of HoiChess, so the log will be empty.

       -x, --xboard[=arg]
               Start in xboard compatible mode. This turns off the input
               prompt and alters the output format to meet the requirements of
               the xboard protocol. Normally, this option should not be
               necessary because hoichess automatically detects when it is
               started under xboard.

               The optional argument can be one of:

               off Force non-xboard mode.

               on  Force xboard mode.

               auto
                   Automatically enable xboard mode when stdout is not a
                   terminal, which is the case when HoiChess is started under
                   xboard.

                   This is the default.

       --book filename
               Set location of opening book.

       --nobook
               Disable opening book.

       --hashsize arg
               Set the size of the main hash table (transposition table).  The
               size is given in bytes, the suffixes ’K’ and ’M’ (e.g. ’32M’)
               may be used to specify size in kilobytes or megabytes,
               respectively.

               A size of 0 disables the hash table.

       --pawnhashsize arg
               Set the size of the pawn hash table.  The size is given in
               bytes, the suffixes ’K’ and ’M’ (e.g. ’32M’) may be used to
               specify size in kilobytes or megabytes, respectively.

               A size of 0 disables the pawn hash table.

       --evalcache arg
               Set the size of the evaluation cache.  The size is given in
               bytes, the suffixes ’K’ and ’M’ (e.g. ’32M’) may be used to
               specify size in kilobytes or megabytes, respectively.

               A size of 0 disables the evaluation cache.

       --name name
               Set engine’s name to name.

       --rcfile filename
               Before accepting input from stdin, first read commands (and
               probably moves) from filename.

       --color arg
               Control usage of ANSI color control sequences, e.g. when
               displaying the chess board.

               arg can be one of:

               off Never use ANSI color sequences.

               on  Always use ANSI color sequences.

               auto
                   Automatically use ANSI color sequences when stdout is a
                   terminal.

               On Unix platforms, the default is auto. On Windows platforms,
               the default is off, because the Windows terminal is normally
               not ANSI capable.

COMMANDS

       hoichess supports most commands of the XBoard protocol. Those commands
       are described in detail at
       http://www.tim-mann.org/xboard/engine-intf.html.  Furthermore, the
       following special commands are also available:

       help    Give a brief summary about available commands.

       bench movegen
               Run move generator benchmark.

       bench evaluator
               Run evaluator benchmark.

       bench makemove
               Run benchmark for make_move and unmake_move routines.

       book open bookfile
               Use opening book bookfile.

       book close
               Disable opening book.

       book create bookfile pgnfile depth min_move_count
               Create a new opening book, from the games in pgnfile. The new
               book will be written to bookfile.

               The parameter depth specifies how many moves (half-moves, ply)
               of each game will be included in the opening book. If depth is
               0, there is no depth limit, i.e. all moves of all games will be
               put into the book.

               The parameter min_move_count specifies how many times a move
               must be played until it is added to the opening book.

       debug level
               Set debug level to level.

               If level is omitted, the current debug level is printed.

       evalcache clear
               Clear evaluation cache.

       evalcache size arg
               Set the size of the evaluation cache.  The size is given in
               bytes, the suffixes ’K’ and ’M’ (e.g. ’32M’) may be used to
               specify size in kilobytes or megabytes, respectively.

               A size of 0 disables the evaluation cache.

       evalcache off
               Disable evaluation cache.

       evalcache info
               Print information about evaluation cache.

       evalcache stats
               Print evaluation cache statistics.

       hash clear
               Clear hash table.

       hash size arg
               Set the size of the main hash table (transposition table).  The
               size is given in bytes, the suffixes ’K’ and ’M’ (e.g. ’32M’)
               may be used to specify size in kilobytes or megabytes,
               respectively.

               A size of 0 disables the hash table.

       hash off
               Disable hash table.

       hash info
               Print information about hash table.

       hash stats
               Print hash table statistics.

       hash replace scheme
               Set hash table replacement scheme. Currently available schemes
               are:

               ·   always

                   Always replace existing entries by new entries.

               ·   depth

                   Replace existing entries only by entries with same or
                   higher search depth.

       ignore command
               From now on, ignore the command command. This is basically
               intended for debugging.

               See also command obey.

       obey command
               Do not ignore the command command anymore.

               See also command ignore.

       pawnhash ...
               Configure the pawn hash table. The available options are the
               same as for the main hash table (see command hash), with the
               exception that pawnhash replace is not available, because the
               pawn hash table always uses the "always replace" strategy.

       verbose level
               Set verbosity level to level.

               If level is omitted, the current verbosity level is printed.

       source file
               Read commands from file, just like command line option --rcfile
               does.

       show board
               Display the chess board.

       show fen
               Print the current position’s FEN.

       show moves|captures|noncaptures|escapes
               Show all legal moves, captures, non-captures or escapes.

       show eval
               Evaluate current position and print result.

       show clocks
               Show both players’ clocks.

       show game
               Show information about entire game, e.g. past positions, moves
               played, etc..

       solve epdfile
               Run search on all positions in epdfile (testsuite mode).

SEE ALSO

       http://www.hoicher.de/hoichess

       xboard(6)

AUTHOR

       hoichess was written by Holger Ruckdeschel <holger@hoicher.de>.

       This manual page was generated with pod2man(1).